/**
 * Created by liugaole on 17-5-3.
 */
import java.util.Scanner;

public class MyDCTester  {
            public static void main (String[] args) {

        String expression, again;

        int result;

             try
             {
                   Scanner in = new Scanner(System.in);

                   do
                      {
                         MyDC evaluator = new MyDC();
                        System.out.println ("Enter a valid postfix expression: ");
                        expression = in.nextLine();

                         result = evaluator.evaluate (expression);
                         System.out.println();
                        System.out.println ("That expression equals " + result);

                         System.out.print ("Evaluate another expression [Y/N]? ");
                        again = in.nextLine();
                        System.out.println();
                      }
                  while (again.equalsIgnoreCase("y"));
                }
            catch (Exception IOException)
            {
                  System.out.println("Input exception reported");
                 }
         }
 }
